Anti Theft Double Sealed Manhole Cover Square Ductile Cast Iron Light Weight

A environmental protection with non toxicity raw material, it will not influence to user
B longevity corrosion resistance antirust insulation anti abrasion weather ability excellent ant pressure capability
C competitive price the price is lower than stipulated standard
D low weight it’s convenient to transport install construct easily and reduce working intensity
E nice appearance rich colors and can keep lasted
F anti theft no recycle antitheft naturally
G 1good appearance 2antitheft for non recycle value 3 light weight 4 noise free

Standards and features:
 
1. high strength. Tensile strength σs≥420MPa, yield strength σs≥300MPa, same as low carbon steel, three times that of gray iron
2. Good toughness. The impact value is similar to that of medium carbon steel, which is more than 10 times that of gray iron material.
3. Good plasticity. The elongation is as large as 7%, which is similar to high carbon steel, while the gray iron steel has an elongation of zero.
4. Strong corrosion resistance. In the water spray corrosion test, the corrosion amount in 90 days is only one tenth of that of the steel pipe, which is one tenth of that of the gray iron pipe. The service life is twice that of gray cast iron, which is 5 times that of ordinary steel pipe.
 

 Use
 
1. Anti-corrosion project, open ditch; It can be made according to customers requirements.